Between the microplastics, the pfoas and other fluorine based stuff from 3M, and the lead in fuel that airplanes are still allowed to use, and the lack of a more natural diet, it's no wonder we're all so screwed up.
It's worse than "allowed" to use, in the US it's more like "required to use". Newer engines that work on unleaded gas exist, and even some older engines are perfectly capable on unleaded gas. However, the FAA has to test and approve each part that goes on an airplane, and it's a ton of work to do that for every type of airplane engine. Unless the government subsidized such testing and paid for unleaded fuel tanks to be installed all over the country, it's unlikely to change anytime soon.
To be fair, I think this is for gas engines and not jet engines. So big commercial airports, and the conchem trail generating traffic, are in the clear.
No, it's just the smaller airports and tiny fields used for crop dusters. You know. The ones that are literally everywhere. :(
well that and being told for your entire life that you could be anything you want and do anything with your life that you chose as long as you worked hard (oh, and voted for tax cuts for the rich).